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Finding the Fourth Proportional to 112,343.91, 154,963.39 and 85,427.40

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Solution

The fourth proportional to 112,343.91, 154,963.39 and 85,427.40 is: 117,835.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,343.91 : 154,963.39 = 85,427.40 : x
  2. Step 2: Convert to fraction form
    112,343.91/154,963.39 = 85,427.40/x
  3. Step 3: Cross multiply
    112,343.91x = 154,963.39 × 85,427.40
  4. Step 4: Simplify right side
    112,343.91x = 13,238,119,502.89
  5. Step 5: Solve for x
    x = 13,238,119,502.89/112,343.91
  6. Step 6: Final answer
    x = 117,835.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.